From December 21, 1987 to December 21, 1988 he flew as flight engineer on Soyuz TM-4. The duration was 365 days 22 hours 38 minutes. From December 2, 1990 to May 26, 1991 he flew again as a flight engineer on Soyuz TM-11. The duration was 175 days 1 hour 50 minutes,[2] the longest continuous time spent in space by anyone at that time. During his 176-day stay, Manarov observed the Earth and worked in space manufacturing. He also performed 20 hours of spacewalks.[3] Manarov currently lives in Russia.